Upper three panels: the reduced CoRoT light curve (black dots, brightest at the top) and residuals (grey dots) after prewhitening with a model (red solid line) constructed using the set of 424 frequencies listed in Table A.1 – see text for further explanation. Lower two panels: the Scargle periodogram of the full CoRoT light curve (blue solid line) showing the 424 frequencies (red vertical lines). For better visibility, the red lines are repeated in grey in the background, after multiplying their amplitude with a factor ten. Aliases of the strongest peaks around  ~1   d^-1 due to the satellite orbital motion can be seen around 12, 14 and 16 d^-1.